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implement mlockall()/munlockall() for LTP syscall

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This commit is contained in:
NAKAMURA Gou
2015-03-12 16:28:57 +09:00
parent 786ae83380
commit 055769254d
3 changed files with 39 additions and 0 deletions
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6
arch/x86/kernel/include/arch/mman.h
View File

@ -27,4 +27,10 @@
#define MAP_STACK 0x00020000 #define MAP_STACK 0x00020000
#define MAP_HUGETLB 0x00040000 #define MAP_HUGETLB 0x00040000
/*
* for mlockall()
*/
#define MCL_CURRENT 0x01
#define MCL_FUTURE 0x02
#endif /* HEADER_ARCH_MMAN_H */ #endif /* HEADER_ARCH_MMAN_H */

2
arch/x86/kernel/include/syscall_list.h
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@ -88,6 +88,8 @@ SYSCALL_HANDLED(147, sched_get_priority_min)
SYSCALL_HANDLED(148, sched_rr_get_interval) SYSCALL_HANDLED(148, sched_rr_get_interval)
SYSCALL_HANDLED(149, mlock) SYSCALL_HANDLED(149, mlock)
SYSCALL_HANDLED(150, munlock) SYSCALL_HANDLED(150, munlock)
SYSCALL_HANDLED(151, mlockall)
SYSCALL_HANDLED(152, munlockall)
SYSCALL_HANDLED(158, arch_prctl) SYSCALL_HANDLED(158, arch_prctl)
SYSCALL_HANDLED(160, setrlimit) SYSCALL_HANDLED(160, setrlimit)
SYSCALL_HANDLED(186, gettid) SYSCALL_HANDLED(186, gettid)

31
kernel/syscall.c
View File

@ -5038,6 +5038,37 @@ out2:
return error; return error;
} }
SYSCALL_DECLARE(mlockall)
{
const int flags = ihk_mc_syscall_arg0(ctx);
struct process *proc = cpu_local_var(current);
uid_t euid = geteuid();
if (!flags || (flags & ~(MCL_CURRENT|MCL_FUTURE))) {
kprintf("mlockall(0x%x):invalid flags: EINVAL\n", flags);
return -EINVAL;
}
if (!euid) {
kprintf("mlockall(0x%x):priv user: 0\n", flags);
return 0;
}
if (proc->rlimit[MCK_RLIMIT_MEMLOCK].rlim_cur != 0) {
kprintf("mlockall(0x%x):limits exists: ENOMEM\n", flags);
return -ENOMEM;
}
kprintf("mlockall(0x%x):no lock permitted: EPERM\n", flags);
return -EPERM;
} /* sys_mlockall() */
SYSCALL_DECLARE(munlockall)
{
kprintf("munlockall(): 0\n");
return 0;
} /* sys_munlockall() */
SYSCALL_DECLARE(remap_file_pages) SYSCALL_DECLARE(remap_file_pages)
{ {
const uintptr_t start0 = ihk_mc_syscall_arg0(ctx); const uintptr_t start0 = ihk_mc_syscall_arg0(ctx);